It is not unusual for climbers (especially New Dawn) to not bloom for even up to three years. These are very vigorous roses and use all their energy up by making growth. Let them grow tall as that is what you bought them to do. Don't fertilize them the first year as they don't need any encouragement. Make sure you put a thick 6 inch mulch of anything you can get in your area because roses love to have cool roots. If possible try and bend the canes as this will make more side shoots emerge and that is where the flowers will come from. Water well, especially if the weather gets really hot.
Nicole, your America is also busy making new growth faster than the others and so is using up all it's energy. It will bloom, maybe not until next year, but it will definately bloom for you.